New Hampshire environmental officials are ordering the installation of air pollution controls at Saint-Gobain Performance Plastics, the company blamed for releasing toxic chemicals into the groundwater near its facility.The announcement Monday by the New Hampshire Department of Environmental Services comes as a result of two years of investigation into perfluoroalkyl and polyfluoroalkyl, also known as PFAS.The chemicals were used in fire-suppressing foam, fast-food wrappers and stain-resistant fabric, but are no longer used in U.S. manufacturing.Saint-Gobain has been working with regulators for two years. The notification requires the company to investigate and apply for a permit to install air pollution controls on its Merrimack facility.A state law that went into effect last month authorizes the state to require controls for air emissions of certain PFAS compounds that impact soil and water.

MERRIMACK, N.H. —

New Hampshire environmental officials are ordering the installation of air pollution controls at Saint-Gobain Performance Plastics, the company blamed for releasing toxic chemicals into the groundwater near its facility.

The announcement Monday by the New Hampshire Department of Environmental Services comes as a result of two years of investigation into perfluoroalkyl and polyfluoroalkyl, also known as PFAS.

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The chemicals were used in fire-suppressing foam, fast-food wrappers and stain-resistant fabric, but are no longer used in U.S. manufacturing.

Saint-Gobain has been working with regulators for two years. The notification requires the company to investigate and apply for a permit to install air pollution controls on its Merrimack facility.

A state law that went into effect last month authorizes the state to require controls for air emissions of certain PFAS compounds that impact soil and water.